Guarantor Financial Statements (Unaudited) (Details) (Senior Notes [Member], USD $) In Millions, unless otherwise specified	Mar. 07, 2013	Jun. 30, 2013 2.375% Senior Notes due March 2018 [Member]	Mar. 07, 2013 2.375% Senior Notes due March 2018 [Member]	Jun. 30, 2013 3.100% Senior Notes due March 2020 [Member]	Mar. 07, 2013 3.100% Senior Notes due March 2020 [Member]	Jun. 30, 2013 3.875% Senior Notes due March 2023 [Member]	Mar. 07, 2013 3.875% Senior Notes due March 2023 [Member]	Jun. 30, 2013 5.450% Senior Notes due March 2043 [Member]	Mar. 07, 2013 5.450% Senior Notes due March 2043 [Member]	Feb. 28, 2012 1.40% Senior Notes due 2015 [Member]	Feb. 28, 2012 2.15% Senior Notes due 2017 [Member]	Feb. 28, 2012 3.55% Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 6,500		$ 1,500		$ 1,000		$ 2,000		$ 2,000	$ 500	$ 500
Debt Instrument, Interest Rate, Stated Percentage		2.375%	2.375%	3.10%	3.10%	3.875%	3.875%	5.45%	5.45%	1.40%	2.15%	3.55%